Improvement in valves for sewers



J. M. WOODWARD.

VALVES FORSEWERS. No.176.500. Patented April'25,1876.

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NPETERS, FHDTOLITHOGRAFHER', WASHXNGTOH. D c- UNITED STATES PATENTOrrron.

JABEZ M. WOODWARD, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN VALVES FOR SEWERS.

Specification forming part of Letters Patent No. [76,500, dated April'25, 1876; application filed January 19, 1876.

To all whom it may concern Be it known that I, JABEZ M. WOODWARD, of 278Clinton Street, Brooklyn, county of Kings, State of New York, haveinvented a Valve for Sewers, of which the following is a specification:

It will appear by the accompanying drawing that a short section ofacommon soil-pipe is used, upon and within which is engrafted what isbelieved to be a new and efficient means for excluding from buildingsthe mephitic sewage-gases which are the prolific cause of zymoticdiseases.

In the accompanying drawing, Figure 1 is a side view. Fig. 2 is acentral section Fig. 3, a plan View. Fig. 4 represents a plan and ii leview of valve. Fig. 5 is a plan view of gasket; Fig. 6, a top view andside view of springs.

Similar letters of reference indicate corresponding parts.

A is a section of soil-pipe, opened at the top about twice the length ofthe diameter of its caliber, and as wide as its diameter. The innersides are carried to the top from the center of the circle, as are alsothe outsides, to within three-eighths g) of an inch of the top, wherethe width is increased, so as to giv e a face at the top of at leastthree-eighths of an inch, and at or near each corner is a furtherprojection to hold the screw-bolts. This outside section isthree-quarters g) of an inch longer than the inside opening, and theside facesurfaces are connected at each end by like surfacesthree-eighths of an inch wide, so as to form a continuous facesurfaceall around the opening, which, when planed ofi" to a perfect level, isthe face of the valve. A recess is made in each side face, near which,when in place, will be the upper end of the opening to receive the tworounded lugs of the clapper, hereinafter described, and three-sixteenthsof an inch of the upper end valve-face is beveled at an angle offorty-five degrees, to sustain in place the lip of the gasket describedunder its designating letter further on B is a clapper of a peculiarform, slightly curved on its plane surfaces, square at one end, andeliptical at the other, to fit the halfcircle of the soil-pipe whenplaced at an angle of about forty-five degrees. The side edges above thehalf-circle are made to fit the vertical sides of the opening. Roundedlugs project one-eighth g?) of an inch from each corner, which fit intorecesses in the side faces of the valve. The surface between these lugsis slightly rounded to receive and work easily against the lip of thegasket hereinafter mentioned.

O is a spring, secured to the valve-cover, which impinges against theupper part of the top surface of the clapper, and is made sufficientlystill to cause the clapper to press slightly upon the descending fluid,so that it will fill the spaces between the edges of the clapper and thewalls of the soil-pipe, caused by the force of the fluid raising itslower end.

D is a lip of the valve-face gasket, which is inserted between the upperend of the clapper and the upper end opening in the soil-pipe. The underside of this lip rests on the beveled part of the valve-face, and theother side presses against the rounded section of the upper end of theclapper, following it in all of its movements, and performing the veryimportant office of stopping the flow of sewaggases over the top of theclapper into the soil-pipe above.

E is an opening out of either vertical side wall, for the purpose ofattaching aventilatingpipe, to be led through the roof, or to theoutside of the building. This hole is located near the surface of theclapper when at rest, which is the precise point at which the sewage-gasis stopped, and through this opening is passed off into the outer air,without having to retrace any part of its traveled road against apressing current.

F is the valve-cover, with projecting lugs at the sides to receive thescrew-bolts, corresponding with the lugs described under letter A. Itsuse is too obvious to require a lengthy description. Its dimensions, theopening, and the valve face, should be not less than three-eighths of aninch thick. Its under surface should be planed off level, and firmlyscrewed down upon the gasket which intervenes between it and the valveface.

The arrangement of all these things obvionsiy points to one object.Placed below all The combination of valve B with lips D of the otherwater traps of a building, it will the gasket, spring 0, and cover F,substanstop the flow of sewage-gas into the rooms tiaily as and for thepurpose specified. without prmenting the outflow of liquid to JABEZMARSHALL WOODWARD. the full capacity of the soil or waste pipe toWitnesses: which it may be attached. ARTHUR A. THOMPSON,

I claim specific-e11 as my invention- FRANK 'I. BUTLER.

